JP2018043770A - Packaging bag with spout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag with a spout, enabling increasing the kinds of refillable bottles by further using the shape of a straw, and increasing efficiency of a refilling work.SOLUTION: A packaging bag as a packaging bag with a spout, having a channel forming member at the spout includes: a pair of films to be overlapped on each other; a first seal part provided around the pair of films; a storage part formed in a non-sealed part of the pair of films, and storing a content; a channel forming member arranged between the pair of films; an opening auxiliary line formed in the pair of films and extending across the lengthwise direction of the channel forming member; and a second seal part to the pair of films, provided in a ring shape over the circumferential direction in a part in the lengthwise direction of the channel forming member. A plurality of the second seal parts are provided in the lengthwise direction of the channel forming member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag with a spout.

  Conventionally, a packaging bag provided with a spout has been widely used in order to facilitate the pouring of the content in, for example, a packaging bag (pouch) that contains the content for refilling. Such a packaging bag is manufactured by performing various processes while intermittently or continuously transporting a substrate such as a resin film. However, since the spout is made of a base material in the conventional packaging bag, the shape of the spout is not stable just by maintaining the flow path, and the refilling operation is not easy.

  Therefore, for example, Patent Documents 1 to 3 disclose a pouch with a spout. By using a molded product for the spout, the shape of the spout is stabilized and can be easily refilled by inserting it into the bottle.

Japanese Patent No. 4828413 Japanese Patent No. 4397616 Japanese Patent No. 3142681

  However, since the spout has a thread, it can be used only for a bottle having an inlet having a diameter larger than the diameter of the spout. On the other hand, a configuration using a straw without a thread as a spout has also been proposed, but in this configuration, the flow path of the spout is not formed by a straw, but flows between film-like substrates. Since it was used as an auxiliary member for forming a path, the contents flowed out from the periphery of the straw (between the straw and the base material). There is a problem that a sealing portion of the base material is present around the straw, which obstructs when the spout of the packaging bag is inserted into the inlet of the bottle.

  The present invention has been made in view of the above-mentioned problems of the prior art, and can increase the types of bottles that can be refilled by making better use of the shape of the flow path forming member, and can increase the efficiency of the refilling operation. One of the purposes is to provide a packaging bag with a spout.

  The packaging bag with a spout in one aspect of the present invention is a packaging bag with a spout having a flow path forming member at the spout, and is provided around a pair of films that are superposed on each other. A first seal portion, an unsealed portion of the pair of films, a storage portion for storing contents, the flow path forming member disposed between the pair of films, and the pair of films. An opening assisting line that is formed and extends across the length direction of the flow path forming member, and the pair of rings provided in a ring shape in the circumferential direction in a part of the length direction of the flow path forming member A second seal portion for the film, and a plurality of the second seal portions are provided in the length direction of the flow path forming member.

  The packaging bag with a spout in one aspect of the present invention may have a configuration in which a point seal is provided to adhere one of the pair of films and the flow path forming member.

  In the packaging bag with a spout according to one aspect of the present invention, the second seal portion may be formed so as to intersect the point seal provided along the length direction of the flow path forming member. Good.

  The packaging bag with a spout according to one embodiment of the present invention may have a structure in which the end of the flow path forming member is exposed from the pair of films after opening.

  The packaging bag with a spout in one aspect of the present invention may be configured such that the opening assisting line is formed so as to cross over the flow path forming member excluding the second seal portion.

  The packaging bag with a spout in one aspect of the present invention may have a configuration in which the spout is provided so as to face obliquely upward from the housing portion.

  The packaging bag with a spout in one embodiment of the present invention may include a sealant layer containing a biomass-derived polyolefin in the film.

  INDUSTRIAL APPLICABILITY The present invention can provide a packaging bag with a spout that can increase the types of bottles that can be refilled by making better use of the shape of the straw and can increase the efficiency of the refilling operation.

The top view which shows the structure of a packaging bag with a spout. The figure which expands and shows the structure of the pouring opening vicinity of a packaging bag. Sectional drawing which follows the AA line in FIG. The top view which shows the packaging bag after opening. The flowchart for demonstrating the manufacturing method of a packaging bag with a spout. The figure which shows the structure of the bag making machine for manufacturing a packaging bag with a spout continuously. (A), (b) is a figure for demonstrating a point seal | sticker process. The perspective view which shows the metal mold | die used at a flow-path formation member sealing process. The figure which shows the relationship between the press part of a metal mold | die, and a flow-path formation member. (A), (b) is a figure for demonstrating a flow-path formation member sealing process. The figure for demonstrating a flow-path formation member sealing process. The figure for demonstrating a flow-path formation member sealing process. The figure which shows an example of the usage method of a packaging bag.

  Embodiments of the present invention will be described below with reference to the drawings. In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

[Packaging bag]
FIG. 1 is a plan view showing a configuration of a spout-equipped packaging bag 5 in the present embodiment. FIG. 2 is an enlarged view showing the configuration near the spout of the packaging bag 5.
As shown in FIG. 1, the packaging bag 5 of this embodiment includes two trunk films (films) 2 and 2 having the same planar shape, and a bottom part folded in two around a folding line 3a. A standing pouch composed of film 3.

  As shown in FIG. 1, the bottom film 3 is folded between the lower portions of the pair of body films 2, 2 so that the fold line 3 a is inward. The pair of body film 2, 2 and the bottom film 3 are overlapped, and except for the filling port 13, the periphery of each body film 2, 2 is integrally formed by heat sealing. Specifically, the packaging bag 5 has side end seal portions 5b and 5b formed by sealing the left and right side ends, and the lower side of the body films 2 and 2 and the bottom film 3 facing each other. A bottom seal portion 5a formed by sealing lower end edges of the opposing surfaces. In FIG. 1, hatching is added to clearly indicate the range of the seal portion.

  The filling port 13 positioned on the upper end side of the body film 2, 2 is opened for filling the contents, and the contents can be filled into the accommodating portion 1 a of the packaging bag 5 through the filling port 13. Is possible. In addition, after the contents are filled in the accommodating portion 1a formed in the first unsealed portion (unsealed portion) 15A, the filling port 13 is closed by being sealed in the same manner as the other portions. The The first unsealed portion 15A is a portion where the body films 2 and 2 are overlapped so as to be separable from each other without being sealed (adhered or bonded). The packaging bag 5 after the contents are filled in the accommodating portion 1a has a bottom area that is increased by the bottom film 3 being pushed downward by the weight of the contents, and can be standing.

  As shown in FIG. 1, a second unsealed portion 15 </ b> B serving as a flow path for the spout 14 is provided from the storage portion 1 a to the packaging bag between the upper corner of the packaging bag 5, that is, between the upper side 14 a and the side 14 b. 5 is provided so as to face diagonally upward.

  The side seal portions (first seal portions) 15a and 15b each define both side portions of the flow path when the front end portion of the spout 14 is removed and the flow path is opened, and one side seal portion. The flow path forming member 4 disposed in the second unsealed part 15B between the 15a and the other side seal part 15b becomes the flow path of the spout 14. Examples of the flow path forming member 4 include a cylindrical straw. The tip of the second unsealed portion 15B is closed by a sealing seal portion (first seal portion) 15c.

  Such a flow path forming member 4 is arranged such that the length direction thereof is along the flow path direction C shown in FIG. 1, and a part of at least one trunk film 2 is partially formed by the point seal 19 shown in FIG. 2. It is thermally welded and fixed.

The flow path forming member 4 of the present embodiment is further fixed to the body film 2, 2 by two second seal portions 25, 25. The second seal portions 25, 25 are respectively formed along the circumferential direction in at least a part of the length direction of the flow path forming member 4.
Each of the second seal portions 25, 25 is formed by the pair of body film 2, 2 being in close contact with the outer peripheral surface of the flow path forming member 4, so that the first unsealed portion 15A and the second unsealed portion The part 15 </ b> B is in communication with the flow path forming member 4. Of the flow path forming member 4, the region other than where the second seal portions 25, 25 are formed is not bonded to the body film 2, 2. The front end 4a of the flow path forming member 4 is exposed in the second unsealed portion 15B and is not bonded to the body films 2 and 2. The width | variety and arrangement | positioning space | interval of the 2nd seal | sticker parts 25 and 25 are set suitably.

  In order to facilitate the opening, the spout 14 is provided with an opening assisting line 9 formed so as to cross the flow path forming member 4 and the second unsealed portion 15B as a flow path. The opening assisting line 9 is formed on the inner side in the length direction of the flow path forming member 4 so that the front end 4a of the flow path forming member 4 is exposed from the body films 2 and 2 at the time of opening.

  Further, the spout 14 is further provided with a tab 16a formed on one end side of the opening assisting line 9 by a cut line 17a and a tab 16b formed on the other end side of the opening assisting line 9 by a cut line 17b. It has been. In the following description, when the tab 16a and the tab 16b are not distinguished, they may be simply referred to as the tab 16.

  The opening assisting line 9 extends so as to intersect the length direction of the flow path forming member 4. The opening assisting line 9 is formed so as to cross the flow path forming member 4 in a region excluding the second seal portions 25 and 25 in the radial direction, and the opening assisting line 9 includes one cut line 17a and the other cutout line. By being connected to the line 17b, the tab 16 can be separated when opened (FIG. 4). The opening assist line 9 is provided on each of the two body films 2 and 2 including the spout 14.

  Such an opening assist line 9 is composed of a half cut line. The half-cut line has a structure in which a part in the thickness direction of the body film 2 is continuously cut in the length direction. Since the trunk | drum film 2 is connected by at least one part of the thickness direction, the content does not leak through a half cut line before opening. Although the range in which the opening assistance line 9 is formed in the thickness direction of the trunk | drum film 2 is not specifically limited, It is preferable that a cutting part is not exposed to the inner side or the outer side (one or both) of the trunk | drum film 2. FIG. As a method for forming a half-cut line inside the body film 2, laser processing is exemplified. Examples of a method for forming a half-cut line on the surface of the body film 2 include laser processing and a blade.

Although the dimension of the packaging bag 5 is not specifically limited, As a suitable range as a container for refilling, the height (Y direction length) of the packaging bag 5 is about 100-500 mm, and the width (both sides of the packaging bag 5). The maximum width between the ends (length in the X direction) is about 70 to 300 mm, and the filling amount of the contents is about 100 to 5000 cm ³ . The contents are not particularly limited, and examples thereof include liquids, solids such as powders and granules, viscous bodies, liquids, and mixtures thereof.

  As the film used as the body film 2 and the bottom film 3, those conventionally used, for example, films made of biaxially stretched polypropylene, biaxially stretched polyamide, biaxially stretched polyester, etc. are used as the base film 29, and these A laminate 20 (FIG. 6) is used in which a polyolefin resin such as low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, and polypropylene is laminated as the sealant film 18.

  As an example, the sealant film 18 is formed by laminating an inner sealant layer 18A (FIG. 6) that is the inner side of the packaging bag 5, an intermediate sealant layer, and a base material side sealant layer that is in contact with the base film in this order. A laminated film having a three-layer structure can be obtained. Of the three layers, the inner sealant layer 18A can also include a biomass-derived polyolefin resin. For example, the inner sealant layer 18A can contain 50% or more and 100% or less of a biomass-derived polyolefin resin.

  The substrate film 29 may be a single layer or a laminated body, and may be a polyethylene terephthalate (PET) resin film, a polyamide (PA) resin film, a polyethylene naphthalate (PEN) resin film, a polyacrylonitrile (PAN) resin film, or a polycarbonate (PC). Resin films, polyimide (PI) resin films, and the like can be used. Moreover, a vapor deposition layer, metal foil, a printing layer, and a functional layer can be included.

  Examples of the method for producing the laminate 20 include a dry lamination method, an extrusion lamination method, and a coextrusion method. An adhesive agent, an anchor agent, or the like can be provided between the base film 29 and the sealant film 18 in order to improve the adhesive strength. In this case, a plurality of substrate films may be laminated in order to increase the strength of the packaging bag 5. Alternatively, a metal foil such as an aluminum foil, a metal vapor-deposited layer, an inorganic vapor-deposited layer such as ceramic, an ethylene-vinyl alcohol copolymer film, or the like may be laminated in order to improve the barrier property against gas or ultraviolet rays.

(Structure near the spout)
Next, the structure near the spout of the packaging bag 5 will be described in detail. In the following description, FIGS. 1 and 2 are referred to as appropriate. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a plan view showing the packaging bag 5 after opening.

  As shown in FIGS. 1 and 2, in this embodiment, the ring-shaped second seal portion is closer to the end 4 b on the first unsealed portion 15 </ b> A side than the central portion in the length direction of the flow path forming member 4. 25, 25 are provided in the length direction of the flow path forming member 4 at a predetermined interval from each other, and the end of the second seal portion 25, 25 tip 4a is exposed in the second unsealed portion 15B. It has become.

As shown in FIG. 3, the body film 2, 2 is in close contact with each other in the circumferential direction of the flow path forming member 4 at the location where the second seal portions 25, 25 are formed. There is no gap between the outer peripheral surface of the film and the body films 2 and 2.
In addition, the number of the 2nd seal | sticker parts 25 is not restricted to two, You may provide three or more.

  As shown in FIG. 2, the opening assisting line 9 of the present embodiment is such that the flow path forming member 4 is exposed for a predetermined length from the pair of body films 2 and 2 after opening (FIG. 4). The position is set. Specifically, the position of the opening assisting line 9 is set to be within a range of 20% or more and 50% or less from the front end 4a of the flow path forming member 4 in the length direction of the flow path forming member 4. As a result, of the entire length of the flow path forming member 4, a length of 20% or more and 50% or less from the tip 4 a is exposed from the body film 2, 2 after opening (FIG. 4).

[Method of manufacturing packaging bag with spout]
Next, the manufacturing method of the packaging bag with a spout which concerns on this invention is described.
FIG. 5 is a flowchart for explaining a method of manufacturing the packaging bag with spout 5 in the present embodiment. FIG. 6 is a diagram illustrating a configuration of a bag making machine 10 for continuously manufacturing the packaging bag 5 with a spout. FIGS. 7A and 7B are diagrams for explaining the point sealing step S4. FIG. 8 is a perspective view showing a mold used in the flow path forming member sealing step S5. FIG. 9 is a diagram showing the relationship between the pressing portion of the mold and the flow path forming member. 10A and 10B are diagrams for explaining the flow path forming member sealing step S5. FIG. 11 is a diagram for explaining the flow path forming member sealing step S5. FIG. 12 is a diagram for explaining the flow path forming member sealing step S5.

  As shown in FIG. 5, the manufacturing method of the spout-equipped packaging bag 5 according to the present embodiment includes a recess forming step S1, a laminate double leaf forming step S2, a channel forming member supplying step S3, a point sealing step S4, and a channel forming. The member sealing step S5, the vertical and horizontal sealing step S6, and the separation step S7 are mainly performed. In the present embodiment, the flow path forming member sealing step S5 will be described in detail.

(1) Concave forming step S1
First, the recesses 24 and 24 for arranging the flow path forming members 4 and 4 are formed on the stacked body 20 fed from the feed roll 21. Specifically, the arrangement region of the flow path forming member 4 is preheated at a predetermined interval along the transport direction of the laminate 20 by the preheating portion 49a in the recess forming means 49, and the laminate 20 is applied to the laminate 20 by the recess forming portion 49b. A pair of recesses 24 is formed. The bag making machine 10 of the present embodiment forms two recesses 24 in the width direction for two chamfering. When the recess forming means 49 is not provided, the recess forming step S1 can be omitted.

(2) Laminate double leaf process S2
In the laminate double leaf process S2, the laminate 20 is cut at the center in the width direction by the cutter 42a of the laminate double leaf means 42 in the bag making machine 10 shown in FIG. . Thereafter, the body films 2 and 2 are transported while being separated from each other in the vertical direction with the inner sealant layer 18 </ b> A side facing each other.

(3) Flow path forming member supply step S3
Next, as shown in FIG. 6, the flow path forming member 4 is supplied to a predetermined position on the inner sealant layer 18 </ b> A in the one body film 2 conveyed below (FIG. 7A). Specifically, the flow path forming member supplied from the flow path forming member standby part 54 in the flow path forming member supply means 44 to the flow path forming member conveying means 52 one by one via the flow path forming member supply valve 58. 4 is sucked and held by the installation portion 53 and moved onto the body film 2 to be arranged. Here, as shown to Fig.7 (a), it is preferable to form the recessed part 24 in the area | region where the flow-path formation member 4 is arrange | positioned among the trunk | drum films 2. FIG.

(4) Point seal process S4
Next, part of the flow path forming member 4 is thermally welded to the body film 2 by the point seal portion 55 and temporarily fixed (FIG. 7B).

(5) Flow path forming member sealing step S5
Next, as shown in FIG. 6, the other body film 2 is superposed on one body film 2 on which the flow path forming member 4 is arranged, and each body film 2 is formed by the bottom base material insertion means 22. The bottom film 3 is inserted between both ends in the width direction of the sheet 2 and conveyed, and the desired regions of the body films 2 and 2 and the bottom film 3 are sequentially sealed.

  First, the second seal portions 25 and 25 are formed by sealing the portions where the flow path forming member 4 is interposed, of the pair of body film 2 and 2 that are overlapped by the flow path forming member sealing means 56, The flow path forming member 4 is fixed to the body films 2 and 2.

Here, this step will be described in detail.
In this process, since the bag making machine 10 is chamfered, a mold 30 capable of simultaneously forming the second seal portions 25 and 25 on the two flow path forming members 4 is used (FIG. 8). The mold 30 includes a fixed mold 30A and a movable mold 30B that have the same shape and are opposed to each other.

  As shown in FIG. 8, the fixed mold 30 </ b> A and the movable mold 30 </ b> B are common to a pair of second recesses 34 formed relatively in the length direction (Y direction) and the pair of second recesses 34. It has the 1st recessed part 33 and the press part 31 provided 2 each between the 2nd recessed parts 34 and 34 and the 1st recessed part 33, respectively.

  The two pressing portions 31, 31 corresponding to one flow path forming member 4 are provided at a slight interval, and approximately half so that the respective pressing surfaces 31 a, 31 a follow the outer peripheral surface of the flow path forming member 4. It is curved in a circular shape. For example, as shown in FIG. 9, by setting the radius of curvature r2 of the pressing surfaces 31a, 31a of the pressing portion 31 to be smaller than the radius of curvature r1 of the flow path forming member 4, each of the molds 30A, 30B The pressing surfaces 31 a and 31 a of the pressing portion 31 are in contact with the outer peripheral surface of the flow path forming member 4 with no gaps via the body films 2 and 2.

  The fixed mold 30 </ b> A and the movable mold 30 </ b> B are installed on the production line of the bag making machine 10 in a state where the length direction is matched with the width direction of the body film 2.

  In this step, as shown in FIGS. 10 (a) and 10 (b), the body films 2 and 2 overlapped with each other through the flow path forming member 4 by the fixed mold 30A and the movable mold 30B are viewed from above and below. The second seal portions 25 and 25 for the body films 2 and 2 are formed at two locations around the flow path forming member 4 by being sandwiched and pressed. As described above, the fixed mold 30A and the movable mold 30B have the pressing portions 31 and 31 each having the pressing surfaces 31a and 31a having the curvature radius r2 smaller than the curvature radius r1 of the outer peripheral surface of the flow path forming member 4. 10 (b), the pressing portions 31, 31 are pressed so as to be pushed inward in the radial direction over the entire circumferential direction of the predetermined seal portion in the flow path forming member 4, as shown in FIG. It will be. Thereby, the part in which the 2nd seal | sticker parts 25 and 25 of the flow-path formation member 4 were formed is formed so that it may dent a little radially inward from an outer peripheral surface. As shown in FIG. 11, in the portion where the second seal portions 25, 25 of the flow path forming member 4 are formed, the body film 2, 2 is in close contact with the entire outer peripheral surface of the flow path forming member 4. .

  Further, when a predetermined portion of the flow path forming member 4 is pressed radially inward by the pressing portions 31, 31, the region between the pressed portions of the flow path forming member 4 may be bent and deformed radially outward. . Thus, the region between the second seal portions 25, 25 may be slightly convexly deformed.

  Here, the shape of the connecting portion 30b where the facing surface 30a and the pressing surface 31a in the fixed die 30A and the movable die 30B are connected is determined so that each die 30A, 30B is the body film 2 when the second seal portion 25 is formed. , 2, it is preferable to have a shape that does not damage the body film 2. For example, the connecting portion 30b may be provided with a curved surface or an inclination. Thereby, the malfunction that the trunk | drum films 2 and 2 are torn by the connection part 30b at the time of a press and a hole is made can be prevented.

(6) Vertical and horizontal sealing process S6
Subsequently, the vertical sealing means 45 performs vertical sealing of the laminated portions along the conveying direction of the body film 2, 2 and the bottom film 3. More specifically, the bottom seal portion 5a of the packaging bag 5 of the body film 2 or 2 is heated by heating a region for vertical sealing along the transport direction with a heater (not shown) and then cooling with a cooling unit (not shown). Heat seal the area.

  Further, the horizontal sealing means 46 performs horizontal sealing along the width direction of the body films 2 and 2. Specifically, after the region of the body film 2, 2 that performs horizontal sealing along the width direction is heated by a heater (not shown), it is cooled by a cooling unit (not shown), thereby both sides of the body film 2, 2. The region to be the side end seal portions 5b, 5b is heat sealed. In this way, the first unsealed portion 15A that becomes the accommodating portion 1a shown in FIG. 1 is obtained.

  At the time of each sealing operation, the buffer means 41 and 41 are used for the body film 2 and 2 and the bottom film 3 which are supplied in a continuous feed from the laminated body double leaf means 42 and the bottom base material insertion means 22 and overlap each other. A variable amount of buffer is formed and conveyed intermittently by the intermittent driving means 43 and 48 at a predetermined interval.

(7) Separation step S7
Next, as shown in FIG. 6, the center part in the width direction of the heat-sealed body film 2, 2 is cut in half by a cutter 47 a and a separation line (not shown) along the width direction of the body film 2, 2 is used. The two packaging bags 5 and 5 are separated by cutting according to the above.
In this way, a plurality of packaging bags 5 with spouts are manufactured.

  As described above, in the present embodiment, the second seal portion 25 is formed by closely attaching the body films 2 and 2 around the flow path forming member 4. Further, since the second seal portions 25 and 25 are provided in a double manner, the contents are prevented from flowing out from the gap between the flow path forming member 4 and the body films 2 and 2, thereby forming the flow path. It is configured to be poured out from the spout 14 through a flow path formed in the member 4. As described above, the width of the side seal portions 15 a and 15 b formed around the flow path forming member 4 can be reduced by the second seal portion 25 utilizing the shape of the flow path forming member 4 having a cylindrical shape. it can.

  Furthermore, in this embodiment, it has the structure where the front-end | tip 4a of the flow-path formation member 4 is exposed from the trunk | drum films 2 and 2 after opening. Therefore, for example, as shown in FIG. 13, even if the inlet 64 on the bottle 60 side is small, the side seal portions 15a and 15b do not get in the way, and the spout 14 (flow path) of the packaging bag 5 Since the tip 4a side of the forming member 4 can be easily inserted, it is easy to use. Further, the flow path of the spout 14 is formed by the flow path forming member 4 which is exposed for the first time after opening rather than the structure in which the flow path of the spout 14 is formed by the body films 2 and 2 exposed before opening. The outlet 14 is clean.

  Thus, by exposing a part of the flow path forming member 4 from the body film 2, 2 and providing the second seal portions 25, 25 that cut off the flow path on the outer periphery of the flow path forming member 4 in duplicate. The spout 14 (the tip 4a side of the flow path forming member 4) of the packaging bag 5 can be inserted into the inlet 64 of the bottle 60 that is only slightly larger than the outer diameter of the flow path forming member 4.

    Furthermore, by forming the second seal portions 25 and 25 so as to intersect with the point seal 19 provided along the length direction of the flow path forming member 4, the body films 2 and 2 of the flow path forming member 4. The seal strength against the film can be further increased, and film peeling due to deterioration of the seal portion can be suppressed for a long time.

  Moreover, even if the sealant film 18 is a biomass-derived sealant film, the configuration in which a plurality of the second seal portions 25, 25 are provided as in the present invention can be suitably used. When the sealant film 18 (inner sealant layer 18A) constituting the trunk film 2 contains a biomass-derived polyolefin-based resin and a plurality of second seal parts 25 are not provided, the contents are poured when poured into the bottle 60. May leak.

  That is, when the second seal portions 25, 25 are not provided in a plurality as in the present embodiment, and the second seal portion 25 has only one place, the biomass-derived polyethylene has a seal strength higher than that of the petroleum-derived polyolefin. Since there is a thing with weak adhesiveness, peeling of the 2nd seal part 25 resulting from weak adhesiveness of the 2nd seal part 25 occurs, and the contents are not discharged only from channel formation member 4 at the time of pouring. It may be discharged from between the part film 2 and the flow path forming member 4 and leaked without being poured into the bottle 60.

  On the other hand, if the packaging bag is provided with the flow path forming member 4 as in the present embodiment, the second seal can be obtained even if the packaging bag 5 is made using a sealant film containing a polyolefin-based resin derived from biomass. Since the portions 25 and 25 are doubled, the sealant film and the flow path forming member 4 are strongly bonded, and the content does not leak when poured into the bottle 60.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples.

  For example, in the portion between the second seal portions 25 and 25 provided at a predetermined interval from each other, a part of the flow path forming member 4 is bent by the pressing by the molds 30A and 30B and slightly protrudes radially outward. It may be a shape.

  In addition, if the body films 2 and 2 are in close contact with each other over the circumferential direction of the flow path forming member 4 in the second seal portions 25 and 25, the flow path is formed at the portion between the second seal portions 25 and 25. There may be a slight gap between the member 4 and the body films 2 and 2.

  DESCRIPTION OF SYMBOLS 1a ... Accommodating part, 2 ... trunk | drum film (film), 4 ... flow path formation member, 4a ... tip, 5 ... packaging bag, 9 ... opening assistance line, 14 ... spout, 15A ... 1st unsealed part (not yet) Seal part), 19 ... point seal, 25 ... second seal part

Claims (7)

A packaging bag with a spout having a flow path forming member at the spout,
A pair of films superimposed on each other;
A first seal portion provided around the pair of films;
An accommodating portion that is formed in an unsealed portion of the pair of films and accommodates contents;
The flow path forming member disposed between the pair of films;
An opening assist line formed on the pair of films and extending across the length direction of the flow path forming member;
A second seal portion for the pair of films provided in a ring shape in the circumferential direction in a part of the length direction of the flow path forming member,
A plurality of the second seal portions are provided in the length direction of the flow path forming member.
Packaging bag with spout. A point seal for bonding one of the pair of films and the flow path forming member is provided,
The packaging bag with a spout according to claim 1. The second seal portion is formed so as to intersect the point seal provided along the length direction of the flow path forming member.
The packaging bag with a spout according to claim 1 or 2. The front end of the flow path forming member is exposed from the pair of films after opening.
The packaging bag with a spout as described in any one of Claim 1 to 3. The opening assist line is formed so as to cross over the flow path forming member excluding the second seal portion.
The packaging bag with a spout according to any one of claims 1 to 4. The spout is provided so as to face obliquely upward from the accommodating portion.
The packaging bag with a spout according to any one of claims 1 to 5. The film includes a sealant layer containing biomass-derived polyolefin,
The packaging bag with a spout according to any one of claims 1 to 6.

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